Riving machine



Jan. 6, 1931. E. MILLER RIVING MACHINE Y Filed Jun'e' 24,; 1929 l mmmmmmmmmmmmmm alfa ' e 'of uniform-thicknessma D@ Ajects in View.

Patented Jan. 6., 1.931

EDWARnMrLLERpoF HUNTINGTON frenz,

u N vlfcnnirronmn,lfnssrenomro, EVANSAUTQ nonnina eoMPANY, -1no.,.-or memoir; memoriam,@CORPORATION pnnnnnwnnn This invention relates to; ivingrnchines,..r

end has .for'itsprincipalt Object?tliefprevisione ,of a new einbl-notel-lconstructionwherebyl strips of'veneer of relznt-7` l gretflength andf esob'tained'. Another objectief to'fprovirlewriving-ma- Thefabov'e being among#the,1objectsoffthe.i

p E presentinvention, the Lsame consists in *eertainl -novel features-"ot` jcenstructionfend'combine-1f :tions of part-sterbe hereinafter 'described-Wit,

reference to the aocon'ipalnyingfdrawingsg andi" n 4then `claimed,"having the-'above vv'zrnlo'ther 0b-v In the accompanying' drawing which showsi a; suitable embodimentofthe presentinven `tien, and in Awhich likey numerals refer-tor 'like' parts throughoutthe severalv different views ;z

Fig; l-illustrates a-more-'or'fless diagramf J metic'fragmentaryplan-'View of aifriving` machine. n

' Fig. 2 is anenlargecl sectional-iviewtaken: on the line 24-2 of Fig. 15"certainptrtsthereof' being` brokenraway to lbetter 'illustratcfthe construction. f

vl Fig. 3 is @more or-less digramma'tic'vview .illustrating .the manner `inl'l Which?v 1 the strips.

' of veneer are-automatically ejected' fromthe' Y machine. Y

if In riving y .machines as heretoforeficonstructecl, it has been impossible.torcut'nveneerw' like strips of any appreciableilengthend of' vuniform `rthickness'v throughout. fLTh'e'frea'sonf :fiWillbeimaintained at a; ycoristatnt 4dimension Nithrouglrout:the' 'entire'area 'of the4 strip.

o this hes been impossible is duetothe 'fact-thetlfr ieee! sensi N." 373,159. 4

inuneehines` as heretoforeiconstructed -iWhere e; khife'fend fa; table? of-'elatively greet length @Were-employedg-the pressure of the'stckbe- 1-ingfcutgfbetween-the cutting edge' 'of the f'kni'fe the cuttingV gdgeand thetaibleytqspringaway trom each otherlifalongzthe:central' portions `#the'reohitt/itin the* re's'ultfthtthe-@entrai portioni'otheveneer "istrip is'of greaterik thick- 'in'essthanthe'thickness of the ends',wlrichrend thickness thatf (ies-ined:l throughout l:the `^en- "=tirestrip. VlThe greaterthefpressure oflfthe stocklbetween the cutting edgeotthe'knife `end-the tablegthe greaterlihzsbeenthe-varieinasmuch as 1 it .isv desirblef-forother 'reasons tot-obtain relati'velyigreet amount -o'f-Lpres'- sure between the cutting-"eclgefv of.z the I knife il findthe:tablei'duringithe cutting` operation, 'f no meensifhaveheretofore beenipr'o'vicled 1n J a.; commercially. 'praetieble machine` ,1` which lwould perinitthezemployment'of the requisite he fuseiof the-presentAin'ifention,` aconstrucion isfprovidedfby which Veneer strips Vof eltiyely grezitfilength :ma'yf be1-cut,i mdf in AWhich. the thickness' I of the' strips bei-ng cut f-/1Referring'.to thel accompanying-z drawing I @show ja rit/ing nimhinecomprisingvv a pair' of "..rlgid .stetlonery angularslde bars lOLbetWeen 'which' a' iframe comprisingY rigidk sidegmemj bersllfvandwend..'members l2 isslidably re- Jceivetl feln'd adeptedlto reciprocate.' Extend- 1 ing. -between. the side members 11 'of tleffreme `f pressure withoutr causing v an f undue@ iexure iothe Cutting iedgefanditable, With resulting commercially 1 :unsatisfactory-'f products. 1 By i1 `fromfsonclend to the other inreilttively close f but (spaced relationship, is a. plurality of "cross members-13. `These; cross'members 18 arepreferably; formed esrillustr'eted in Fig.

2, tof resist amaximumljaanount of bending vin a. vertical plane. Afrlknifef:supporting l member `14Tis formed 1 independently oflthe recipro'cable'frame; and may be secured Lthere:V

t'ov inf-any suitable mannerfsuch' asatits/end .byy :bolts 15. *The* supporting' member eX- 'atends from:l one? lend` crossnrnember 12' tol the opposite endcrossumemberl ata rela-tively l slight angle to the path of niovementrof the member 14 isprovided in its lower face.

Y with a T-shaped slot V16 extending in parallel relationship to the upper surface of the cor? responding cross member-13. vAloolt 17 vhav-1y v inganei'ilarged head 18 which is slidably fre--.VV ceived inthe corresponding slot 16 Iextends Ydownwardly from each ofA ther :slots '1t'V through the corresponding cross member-13,. and is provided belowtlie'crss`imeinbe13 with Ea. nut 19.A knife 2O liavi ng, a `cutting edge 21 is secured tothe. :upper faceof the Y l p ly out of parallel relationship with respect to member 14 in parallel relationv with; respect l 24 extends fromv one end of the frame tothe ...other end thereofwith the thickeiii-id edge thereto and maybe secured to the member 14uv by any suitable 'means,y as screws 122,as

indicated in Fig. 2.

A table 23-having-a thickened edge portion thereof lying below andinspaced aiid parallel'relationship with respect VVto the cutting-3 edge 21 ofthe, knife 20. The eiidspofzthe.

. table .23 may be secured tothe end members 112' by screws suchjas 25, or `other suitable means. p and thetliickened portionl 24. extend above The under surface of rtlieltable 23 and in spacedY relation to the vupper surface 'ofthe variouscross members 13.

Through each of theQcross members 13 is vertically threaded a pair of bolts 25and23,

n the4 bolt 25;bearing againstthe lower-face vagainst theunder face of the Vopposite-edge ofthe table. If desired, a plurality ofbolts such as 27 :may slidablyextend through each g Qof the crosslmembers -13and thread into 1 rof the bolts 25 and 26,as will-,hereinafter be apparent.

i away from theplane of movement-ofthe cutof the 'portion 24, `andfjtl-ieu' bolt 26 bearing bosses such as 28 formed'on vthe-lower side of the table, so as to maintain the table in contact with the .upper endsofI the boltsxf25` and 26.,v The table 23 is preferablyfurther provided with a so-called @pressurebar?7 29 projecting -above its upper surface 'directly below the cutting edge 21. VBy adjustingjthe bolts 25 and`26, theangularity ofthe' sur-Y face of the table 23 may be varied with respect t'o the plane of movement ofthe cutting edge 18, as will be apparent. This feature, however, is incidental to the main purpose The knife preferably recedes downwardly ting edge 21 fromthe cutting edge 21, for the reasons described inmy application for Letters Patent-of ,the United States .for iin- `proveniente in Riving machines, filed August 20 and table 23 are extended at an langlejto the path of movementyof thev knife` for filed 'on even date herewith.

i' The VsideVmembers-l() carry ,a stationary frame comprisingcross members 30 connectedi together by .the spacedparallel members 31 Ywhich serve to support the hopper compri'sing the vertically extending plate-like members 32 between which the block of 'ste-ck 33`is`vertically slidably received. The hoppen is preferably so positioned-that the 'block ofs'tockf33 'extendsgin almost but' slighttheecutting yedge 21, for a reason that will be hereinafter explained, the relation being suoli willfbeengagedby the cuttingedffe 21 slightlyiny advance ofengagement of any other part of the block of Ystock 33. As explained in my, application filed `on even datey herewith, above referred to, this relative position -of the block of stock 33 and cutting edge 21, rresults in a true slicing action of theknife on the block of stock.A

Iii-operation itis, of course,'evident that as the reciprocable frame is reciprocating, carryiiigtlieknife-2O and table 23 with it, each time the knife20 moves out from under the block of sto'clr33 the block of stock is-pressed Vdownwardly into contact with-the table 23, so that upon the succeeding stroke of the reciprocatingframe the cutting edge will pass through *theV block ,of stock 33 and remove therefrom that portion thereof positioned belowtheplane of movement of the cutting edge21. A's previously explained, where an extremely long 'knife such-as 21 and-table 23 is employed,l the constructions as heretofore provided have been such that the pressure of the stock between the cutting edge 21 and the table 23, or more correctly, in the present construction, between `the cutting edge 21 and .the pressure bar 29, has been suiiicient to cause'a material amount of flexing of the Vknife and the table away from each other and to result in a strip of veneer being cut from the block of stock which has a materially greatenthickness at its center than at its ends, and as previouslypointed out, this va- '1` ria-tion of thickness has been so great as to prevent @commercially acceptable product of a relatively great length; from being produced by a rivmg machine. Such springing or flexing of the knife and the table is preyented in -the present construction by the .27, 1928, Serial NumberA 302,209. The knife V iiieans described.

Y.'Ilietendency of the knife to distort is in an upward direction` and the ,tendency of the tableis to :distort in a 'downwardly direction.

. that-during operation ofthe lmachine the 1 righthandfend Y of tlieblock Vof stock 33 lscribed, thetendency of the knife tefdistort- Awhich tie the memberlli andiA therefore the-'i1 v knife.' downwardly is eiiset'by the screws 25-and l l l 26' which maintain the table' in aupr'edeter.` 'randtherpressurebar 29lsogthat as kthe frame Y :knife k20, Ito a` definiteandpredetermined relationship with respect to l1the1fcro`ss mem-f reach'edthisf crner of theY b'lock Vof, .stock r'33., l

therighthandend of thelstrip Which is being fseveredfrom vthe block iiwilljfhave passed into the yspace'y between 'Y the member` 141 and ther portion-224e?v ofthe. ltableaandv `will have droppeddown onto `the table `member 35. I

bers 131 which! are' of sufficient rigidity tojs'have 4:fc'm'zn-dthatjthelast'corner'ofithefstrip withstand such distorting tendencyrof ythe y The tendency fof thetable'tofdi'stort fi mined' and deiinite relationship?withres'pect tothe cross members 13,. By Vsuitablyy adjust# ii 4ing.thescrews 17, 25fancl26, it will 'thus be apparentfthat the relation *ibetween 'the cut-? tingedge 21and pressure ba'r'29 whichV is car-"fA ried by the table 23,'maybeinitially set at af" predetermined dimension and thereafter its?! dimension'be maintainedregardlessof a rela:"StullV36 fa'ld'ffce lib Oui fof engagement' be' -tiv'e1Y" great `Pressureabetween they Vcuttingidw-eenfthecutil"edge2l and thePlSSSme 'edge' `21 andpressurefbar 29 tending to sepa-'fi rate the cuttlngedge, 21 from the pressure bar 29.

- andr the knife-'supporting member inlthis manner I enabled `vto obtain strips. kof

desired' for instance twelve feet'for even Y ghandend engagingrtheleft;

I have found that by supporting the 'tableveneer; from a blockofstock of anylength"'y greater length.` Thus' thismachine is parI ticularly adaptable for the production of the; slats employed in the formation of Venetian ,Y blinds, and' by being ablel toV produce? su'chf slats on a rivinginachinednsteadof sawing".

' them ashas heretofore been necessary to'ob tain a. lproduct ofthe desired uniformity, I" am enabled to produce such Venetian blinds at a considerably lowerl cost thanhas Vhereto-Q,` fore been possible. '"1

Anothe' featu'ff the Present nvelltion, V is the automati'ce 'jectionf ofthe gv'eneerfstrips f out from the rblo-ckOfstock, andjin-a1direc-j tion' longitudinally of the machine. This is`r` partly the result of positioning th'ebloc'k "off"k stock 33 at a yslightangle to thecutting edge",

l" 21 so that the outer endo'fthcblock'oifstck' (the left hand end AinFigzl) isthe last end Y of the block'to-be operated uponby the knife,y

y and also partly due tothe factthat llposltion the-'block 33-at an extremelyacutenann `g'le to the path of travel 0f :the knife. ItY will be apparent that Whenthe stripfof stock is severed Afrom the block "33 itwill fall .be-

i tween the member-14 `andthe 4part` 24Lof the table, and extending-over the;y various cross'` members 13 at this point,I -prefertoplaceQ a strip of sheet metal'such as 35 to ,form a .table-likesupport forfthestrips ysuch as 36 which are removed from thebl'ock of stockj` 33. "With" this constructioinuand with the' block ofy stock plositioned as'niplain'ed, it, will' be` apparent thatthe upper vleft-hand corner of the'block 33 will be the'y last part of the bl0ck'33 to be'acted'uponfby-the knife edge 21 during the lremoval 'of strip. therefrom. By the time@ theV cutting: ed-'gefihas itsown accord fout' of'th'e 'tableI 35, butwill remain caught between.thecuttlng'edge 21' rnertrstrip e36-to beycutitas viewed inFig.` 1)

willstrikexthe [end `of the 'areviously 'tout bar29- 'softhatxity will falll downontozcthe v table: .35, andv the `end ofthe 'strip now;` being alignedpostion with respect to the left vhand endpof the-previouslyeutstripBG, so that as the strip 36 ynow beingcut: begins to move fand; asf incommenoesfon i its nezrt` cutfwil'lf remain vin substantially abutting :and

f :stock lbeing severed -will notiA fall dowrr Tof Y 4te A:fthewrightduringthefnext non-working stroke of. the reciprocating frame, its 'right previously/.cut stripwill force suchv previ fou'sly: cut strip :to the right (asviewed in Figzl along ther table-and eject itjfgromA theY machine. f, This action continues 'between eachf'of the strips being cut-and the' previouslyf cutI strip; Y `sothat allvv I the strips are automatically,y ejected -endways of the macl1ine,:,-This relatiign` of thestrips is', shownY in a anorelor lessfgdiagrammatic ma-nnervf'in ;Formal changes may be vmadeiinthe specie -embodiment ofr the y invention described ;wi-thout-departing from i' thefspirit or Y sub- ,stancepfthebroadfinvention, the scopeiof which 'l is frcommensnrate with thel appended Claims.. a

What I claim is:

elongated recipro'cableV frame having rigid side members, an elongated knife carriedv by said frame, eXtendingbetween said side members, and meansfcooperatingbetween said knife and said cross members forfmaintaining said knife from flexing in one direction.

, 2. .In ariving machine, reciprocable frame having a plurality' of cross members,a knife carried by said frame, and means -cooperating between said cross members and lsaid yknife Aadj ustably limitin Orinovementoffs'aid knife away from said cross meni'- ers.l Y Y c Y n 3. In a riving machine, in combination, a

.reciprocable'frame having side rails, a plural- Y ity of crosslmembers extending between said Y side:rails, aknife supporting member extendhand-end of fthe in combination, an

a plurality of rigid cross `members in combination, a

' reciprocableframe having side rails, a plural- "ity' of cross membersextending between said; side'rails, a knife supporting member extending over said cross members in spaced relation thereto, and adjustable means extending between said supporting' member and said cross members limiting movement of said supporting member away from said cross members.

' 5. In a riving machine, in combination, a

reciprocable frame having side rails, a plu- Y rality of .cross members extending between said side rails, a knife supporting member exf .a V reciprocatory frame, a knife carriedby said frame, a table carried by said frame in tending over said cross members in spaced relation thereto,-and screw means extending between said supporting member and said cross -f members limiting movement of said supporting member away from said cross members.

6. In a riving machine, in-combination, a

' reciprocable frame havingside rails, a plurality of crossinembers extending between said Y f side rails,- a knife supporting member extendingover said Ycross members in spaced rela-,

tion thereto, said knife supporting member Y- being provided with-T-shaped slots Vin its under surface over each of said cross members, andbolts'havingheads received in said slots extending through said cross members and provided with means on the lower ends thereofrfor limiting the 'space between said sup-1` porting member and said cross members. p

7; In a riving machine, in combination, a

reciprocatory frame, aV knife carried 'by said frame, ak table carried by said frame in a predetermined relationship with respect to said.

knife, cross members on said frame extending y under said table in 'spacedrelationship with respect thereto, and `means` cooperating between said cross members and said-table for maintaining said spaced relationship ata predetermined value.

V8. In` a riving machine, in combination,

a reciprocatory frame, a knife V'carriedby' said'frame, af table carried by said frame 'in a predetermined relationship with Vrespect,

to said knife,-cr'oss membersV on said frame extending undersaid table in Vspaced relationship with respect thereto, and' screw means cooperating between s aid cross members and f said table for maintaining said spaced yrelationship at a 'predetermined value.: `U

9. VIn a riving inachine,in combination, a reciprocatory frame, a knife carried by said i iframe, a table carried by said frame in a predetermined relationship with respect to said knife, .cross members onl said frame ex- Y tending under said table in spacedrelation- Vship with respect thereto, and members fjthreaded throughY saidcross membersfand knife vand said table.

V1,3. In a riving machine, in yreciprocatory Vframe, va knife and a table car- "ried by said'frame,.said knife and said table extending into spaced but adjacent relationlbearii'ig against fsaid table for preventing downward flexing ofsaid table beyond a predetermined position. Y

said frame,`a table Vcarried by said frame Yin a predetermined relationship with respect Vto said knife, cross members on said frame extending under said Vtable in spaced relationship with respect thereto, and screw means-cooperating between said cross mem-l bers and opposite said side edge portions of said table for limiting the spaced relationship between said .table and said cross members andfor controllinglthe angular reia-v tions'hip. ofsaid table relative to theplane' of movement of said knife.

11V.V In a-rivingmachina-in combination,

Ybearing against vsaid table for preventing downward flexing of said table beyond apredetermined position, .and means for maintaining said table in vcontactfvvith"saidmenibers.

A1 2. In a riving extending into spaced but adjacent relationship, and means .for maintaining said spaced relationship at a' predetermined'relationship during the separating influence of aA cutting operation comprising cross members carried by'said frame, and screw members cooperating between said cross members and said combination, a

ship,and means forY maintaining'said spaced p y machine, in combination, a I reciprocatory frame, a knifev and a table carried by said frame, said knife and said table -lUil relationship at a predetermined relationship s during the separatinginiuence of a cutting operation :comprising cross members carried by said frame, and screw members cooperating between said cross members and said knife and said table and acting in opposite directions relativethereto.

' 14. In a riving machine, in combination, a reciprocable frame, a.. knife carried by said frame with its cutting edge disposed at an acute angle to the path ofjmovement of said Vframe, an elongated block of stock,means for supporting saidV stock in position to be operated upon by said knife and disposed with a side'edge thereof at a slight angle to the cut-ting edge ofsaid knife, and a guidewaypositioned ybelow and in relatively adj acentrelation to said knife for receiving the y strips vsevered fom said `block of stock by `said knife, whereby each stripk eut from said block of stock'jwll be dep's'ited'upon said guideway end be lengaged by the strip next removed from said bloek'of stock,k tov eject the firstlmentioned strip from Said machine.V Y

EDWARD MLLER.

soy

:say 

